<template>
  <footer class="footer">
    <span class="todo-count" v-show="listLength"
      ><strong>{{ listLength }}</strong
      >剩余</span
    >
    <ul class="filters">
      <li>
        <a :class="{selected:type === 'all'}" href="#/" @click="changeType('all')">全部</a>
      </li>
      <li>
        <a :class="{selected:type === 'active'}" href="#/active" @click="changeType('active')">进行中</a>
      </li>
      <li>
        <a :class="{selected:type === 'completed'}" href="#/completed" @click="changeType('completed')">已完成</a>
      </li>
    </ul>
    <button class="clear-completed" @click="clearList" v-show="isDoneAll">
      清除已完成
    </button>
  </footer>
</template>

<script>
export default {
  name: 'TodoHeader',
  props: {
    listLength: {
      type: Number,
      required: true,
    },
    isDoneAll: {
      type: Boolean,
      required: true,
    },
    type:{
        type:String,
        required:true
    }
  },
  methods: {
    clearList() {
      this.$emit('clearList');
    },
    //修改父组件中的type
    changeType(type){
        this.$emit('changeType',type)
    }
  },
};
</script>

<style scoped lang="less"></style>
